https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104577
Bug ID: 104577
Summary: needs copy constructor to call method of class
non-type template parameter
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: f.heckenb...@fh-soft.de
Target Milestone: ---
% cat test.cpp
struct S
{
constexpr S () = default;
S (S &&) = delete;
operator int () const { return 0; }
};
template <S s> int i = s;
int main ()
{
return i <S { }>;
}
% g++ -std=c++20 test.cpp
test.cpp:8:20: error: use of deleted function 'constexpr S::S(const S&)'
test.cpp:1:8: note: 'constexpr S::S(const S&)' is implicitly declared as
deleted because 'S' declares a move constructor or move assignment operator
I don't see why a copy constructor should be needed here. (clang accepts it.)
